POLICE are urging teenage girls to be vigilant after a 16-year-old was sexually assaulted in Altrincham.

She was walking along The Narrows towards the town centre when a man grabbed her from behind.

After the attack, at around 8pm on Tuesday, the man ran off towards Altrincham Girls' Grammar School.

Det Sgt Ben Ewart, from Trafford Police, said: "This was a terrifying ordeal for the 16-year-old girl. She has been assisting us in every possible way and has provided a clear description of the offender.

"Although such incidents are rare, I'd like to advise young women in the area to be wary and vigilant at all times, especially in the dark evenings."

The attacker is described as white, in his 30s, 5ft 10in and of stocky build.

Anyone with information is asked to call police on 0161 856 7555 or Crimestoppers on 0800 555111.